67 lines
1.7 KiB
TypeScript
67 lines
1.7 KiB
TypeScript
import type { Config, Selections } from "./types";
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type Listener = () => void;
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/**
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* Minimal reactive store: holds the immutable config plus mutable user
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* selections, and notifies subscribers on any change.
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*/
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export class Store {
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private listeners = new Set<Listener>();
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constructor(
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public readonly config: Config,
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private selections: Selections
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) {}
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getSelections(): Selections {
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return this.selections;
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}
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onChange(listener: Listener): void {
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this.listeners.add(listener);
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}
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private update(patch: Partial<Selections>): void {
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this.selections = { ...this.selections, ...patch };
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this.emit();
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}
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setSelectedPlan(planId: string): void {
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this.update({ selectedPlanId: planId });
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}
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setTargetDate(date: Date): void {
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this.update({ targetDate: date });
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}
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setMissingPeriodActive(periodId: string, isActive: boolean): void {
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const next = new Set(this.selections.activeMissingPeriodIds);
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if (isActive) next.add(periodId);
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else next.delete(periodId);
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this.update({ activeMissingPeriodIds: next });
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}
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setExtraExcludedDays(count: number): void {
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this.update({ extraExcludedDays: Math.max(0, Math.floor(count) || 0) });
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}
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setActualMealBlocks(value: number | null): void {
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this.update({ actualMealBlocks: normalizeBalance(value) });
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}
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setActualFlexDollars(value: number | null): void {
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this.update({ actualFlexDollars: normalizeBalance(value) });
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}
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private emit(): void {
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for (const l of this.listeners) l();
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}
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}
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/** Clamp an entered balance to a non-negative number, or null if blank/invalid. */
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function normalizeBalance(value: number | null): number | null {
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if (value === null || !Number.isFinite(value)) return null;
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return Math.max(0, value);
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}
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